| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 0.87 | 1.06 | 0.65 |
| 2023 | 1.38 | 2.08 | 0.84 |
| 2022 | 2.38 | 3.93 | 1.45 |
| 2021 | 2.85 | 4.89 | 1.86 |
| 2020 | 3.14 | 4.89 | 1.98 |
| 2019 | 40.69 | 103.18 | 2.76 |
| 2018 | 40.45 | 62.01 | 12.33 |
| 2017 | 16.95 | 20.85 | 14.79 |
| 2016 | 26.51 | 32.89 | 19.56 |
| 2015 | 36.49 | 72.9 | 25.03 |
| 2014 | 38.03 | 130.67 | 20.9 |
| 2013 | 31.44 | 43.33 | 21.85 |
| 2012 | 22.91 | 56.29 | 7.85 |
| 2011 | 26.02 | 47.52 | 8.22 |
| 2010 | 18.4 | 32.85 | 10.82 |
| 2009 | 7.88 | 17.61 | 1.87 |
| 2008 | 14.37 | 127.45 | 1.2 |
| 2007 | 53.15 | 110.88 | 7.73 |
| 2006 | 4.56 | 9.44 | 1.66 |
| 2005 | 2.21 | 3.4 | 0.89 |
| 2004 | 1.32 | 2.15 | 0.88 |